Packing: 1pcs Material: aluminum alloy + rubber With 1/4in(6.35mm) and 3/8in(9.5mm) threaded holes, the maximum opening height is 1.8in(46mm). Anti-corrosion, strong and durable, anti-rust, anti-corrosion properties, durable, not easy to fade, long service life Adjustable c-clamp lightweight, easy to carry, very practical Adopt knob adjustment design, you can freely control the angle and height of the c-clip. The bottom of the clip has a protective pad, which can effectively prevent damage to the surface of the object Widely used in various places Easily attach to clamps on tables, carts, benches, workbenches, columns, headrests, etc.